Intel Core i5-10400H vs Intel Xeon E5-2629 v3 Comparison

The Intel Core i5-10400H and Intel Xeon E5-2629 v3 sit at the same 47th percentile of all CPUs, yet they achieve that standing through very different means. The i5-10400H is a 4-core, 8-thread mobile part with a 4.60 GHz boost clock, while the Xeon E5-2629 v3 is an 8-core, 16-thread server processor with a modest 3.20 GHz boost. Their average benchmark scores are nearly identical — 2303 for the i5-10400H versus 2283 for the Xeon — but the head-to-head benchmark results show a clear, consistent winner across every test.

Head-to-Head Benchmarks

The Xeon E5-2629 v3 wins all six head-to-head benchmark comparisons, and it does so with remarkable uniformity. In Cinebench R15 multicore, the Xeon scores 795 against the i5-10400H’s 697, a 12.3% advantage. The single-core result in R15 is similarly one-sided: 112 for the Xeon versus 98 for the i5-10400H, a 12.5% gap. This pattern holds across every generation of the Cinebench suite. In Cinebench R20, the Xeon leads 3315 to 2908 in multicore (12.3% ahead) and 467 to 410 in single-core (12.2% ahead). The R23 results continue the trend: 7893 versus 6924 in multicore and 1114 versus 977 in single-core, both exactly 12.3% gaps.

What stands out here is that the Xeon’s lead is not just in multi-threaded workloads where its 16 threads should dominate the i5-10400H’s 8 threads. It also wins single-core tests, which is counterintuitive given the i5-10400H’s much higher 4.60 GHz boost clock versus the Xeon’s 3.20 GHz. The deltaPct values in the nearestRivals data confirm this is a real, measurable gap: the Xeon is listed as 0.9% ahead of the i5-10400H in average score, while the i5-10400H is listed as 0.9% behind the Xeon. The two CPUs are close in aggregate, but the Xeon is consistently faster in every individual workload tested.

Looking at the broader rival context, both CPUs sit in a tight cluster. The i5-10400H’s nearest rivals include the Intel Core i7-8809G (2307, 0.2% faster), Intel Xeon E-2134 (2319, 0.7% faster), and AMD Ryzen 7 2700 (2320, 0.7% faster). The Xeon E5-2629 v3’s nearest rivals include the Xeon D-1557 (2282, 0% difference) and Core i3-10305 (2264, 0.8% slower). Neither chip is a standout in its peer group, but the Xeon’s consistent benchmark wins mean it should be favored in any workload covered by these tests.

The Verdict

The data points to the Xeon E5-2629 v3 as the faster processor in every measured scenario. Its six-to-zero win record in head-to-head benchmarks is unambiguous, and its 12.3% average lead across Cinebench tests is too large to ignore. If you are choosing purely on benchmark performance, the Xeon E5-2629 v3 is the pick. The i5-10400H is not without merit — its 4.60 GHz boost clock suggests better responsiveness in lightly threaded tasks, but the benchmark scores do not support that theory. The Xeon wins single-core tests too, despite a 1.40 GHz lower boost clock.

The i5-10400H’s case rests on its platform characteristics rather than its benchmark scores. It is a mobile processor with integrated UHD Graphics, a 45W TDP, and an active production status. The Xeon, in contrast, is an end-of-life server part with an 85W TDP and no integrated graphics. If you need a drop-in processor for a laptop or a compact mobile system, the i5-10400H is the only viable option of the two. If you are building or upgrading a Socket 2011-3 workstation and can accommodate the higher power draw, the Xeon offers better performance across the board. The 47th percentile standing for both chips means neither is a high-end part, but within their shared performance tier, the Xeon is the stronger performer.

Architecture Differences

The two processors come from different Intel generations and manufacturing processes. The i5-10400H is built on Comet Lake-H architecture using a 14 nm process node, released in April 2020. The Xeon E5-2629 v3 uses Haswell-EP architecture on a 22 nm process, released in September 2014. The die size and transistor counts reflect this generational gap: the Xeon has 2,600 million transistors on a 356 mm² die, while the i5-10400H’s transistor count and die size are not listed in the data.

Core and thread counts differ significantly. The Xeon doubles the i5-10400H’s thread capacity with 8 cores and 16 threads versus 4 cores and 8 threads. Cache configurations also favor the Xeon: it has 20 MB of shared L3 cache, compared to 6 MB on the i5-10400H. Both share the same per-core L1 (64 KB) and L2 (256 KB) cache sizes.

Memory support is where the platforms diverge most. Both support DDR3 and DDR4, but the Xeon uses a quad-channel memory bus with 59.7 GB/s bandwidth, while the i5-10400H uses dual-channel with 46.9 GB/s. The Xeon also supports ECC memory, which the i5-10400H does not. PCIe connectivity is Gen 3 for both, but the Xeon provides 40 lanes (CPU only) versus the i5-10400H’s unspecified lane count. The Xeon has no integrated graphics, while the i5-10400H includes UHD Graphics.

FAQ

Q: Which processor is faster in Cinebench R23 multicore?

A: The Intel Xeon E5-2629 v3 scores 7893 in Cinebench R23 multicore, which is 12.3% higher than the Intel Core i5-10400H’s 6924.

Q: Does the Intel Core i5-10400H win any benchmark against the Xeon E5-2629 v3?

A: No. In the six head-to-head tests (Cinebench R15, R20, and R23 in both single-core and multicore), the Xeon E5-2629 v3 wins every one. The i5-10400H has zero wins.

Q: Can the Xeon E5-2629 v3 use ECC memory?

A: Yes, the Xeon E5-2629 v3 supports ECC memory. The Intel Core i5-10400H does not support ECC memory.

Q: What is the TDP difference between these two processors?

A: The Intel Core i5-10400H has a TDP of 45W, while the Intel Xeon E5-2629 v3 has a TDP of 85W. The Xeon consumes nearly twice as much power.

Q: Which processor has more cores and threads?

A: The Intel Xeon E5-2629 v3 has 8 cores and 16 threads. The Intel Core i5-10400H has 4 cores and 8 threads — exactly half.

Q: Are both processors still in production?

A: No. The Intel Core i5-10400H is listed as active, while the Intel Xeon E5-2629 v3 is listed as end-of-life.

Where Each One Wins

The Xeon E5-2629 v3 wins in every benchmark category covered by the data. Its largest margins are consistently around 12.3% in multicore tests and 12.2-12.5% in single-core tests. This makes it the clear choice for any workload that relies on raw CPU performance, whether that is multi-threaded rendering, single-threaded legacy applications, or anything in between. The Xeon’s 20 MB L3 cache and quad-channel memory support also make it better suited for memory-bandwidth-sensitive tasks, though these advantages are not directly measured in the provided benchmark scores.

The i5-10400H wins on platform suitability rather than performance. It is a mobile processor with integrated graphics, making it the only sensible option for a laptop or compact system where a discrete GPU is not available. Its 45W TDP is far more manageable in a thermally constrained chassis than the Xeon’s 85W. The i5-10400H also has an active production status, meaning it is still available for new designs, while the Xeon is end-of-life. If you need a processor that works in a small, power-efficient system today, the i5-10400H is the practical choice despite losing every benchmark.

Specification Differences

The two processors differ in nearly every major specification except for manufacturer (both Intel), memory support (both DDR3 and DDR4), and PCIe generation (both Gen 3). The core count differs by a factor of two: the Xeon has 8 cores versus the i5-10400H’s 4, with 16 threads versus 8. Base clocks are close — 2.40 GHz for the Xeon and 2.60 GHz for the i5-10400H — but boost clocks are not: the i5-10400H reaches 4.60 GHz versus the Xeon’s 3.20 GHz. TDP is 85W for the Xeon and 45W for the i5-10400H.

The sockets are incompatible: the i5-10400H uses Intel BGA 1440, while the Xeon uses Intel Socket 2011-3. The process node is 14 nm for the i5-10400H and 22 nm for the Xeon, reflecting their different release generations (2020 versus 2014). L3 cache is 6 MB on the i5-10400H and 20 MB on the Xeon. Memory bandwidth favors the Xeon at 59.7 GB/s over the i5-10400H’s 46.9 GB/s, with the Xeon supporting quad-channel memory versus dual-channel on the i5-10400H. The Xeon supports ECC memory; the i5-10400H does not. The i5-10400H includes integrated UHD Graphics; the Xeon has no integrated graphics. The Xeon provides 40 PCIe lanes (CPU only), while the i5-10400H’s lane count is unspecified. The Xeon is a server/workstation part, the i5-10400H is a mobile part. Both have locked multipliers.